android envsetup: Stop exporting ANDROID_NDK_ROOT.

build/android/adb_gdb

 #!/bin/bash
 #
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 
 # A generic script used to attach to a running Chromium process and
 # debug it. Most users should not use this directly, but one of the
 # wrapper scripts like adb_gdb_content_shell
@@ skipping 227 matching lines @@
 This can be a regular Android application process, or a sandboxed
 service, if you use the --sandboxed or --sandboxed=<num> option.
 
 This script needs several things to work properly. It will try to pick
 them up automatically for you though:
 
    - target gdbserver binary
    - host gdb client (e.g. arm-linux-androideabi-gdb)
    - directory with symbolic version of $PROGRAM_NAME's shared libraries.
 
-If you have sourced Chromium's build/android/envsetup.sh, this script will
-find all of them automatically. This is the recommended way to use it.
-
-Otherwise, if you have ANDROID_NDK_ROOT defined in your environment,
-the script will use it to find the gdb and gdbserver binaries. You can
-also use --ndk-dir=<path> to specify an alternative NDK installation
+You can also use --ndk-dir=<path> to specify an alternative NDK installation
 directory.
 
 The script tries to find the most recent version of the debug version of
 shared libraries under one of the following directories:
 
   \$CHROMIUM_SRC/<out>/Release/lib/           (used by Ninja builds)
   \$CHROMIUM_SRC/<out>/Debug/lib/             (used by Ninja builds)
   \$CHROMIUM_SRC/<out>/Release/lib.target/    (used by Make builds)
   \$CHROMIUM_SRC/<out>/Debug/lib.target/      (used by Make builds)
 
@@ skipping 71 matching lines @@
 
 EOF
   exit 0
 fi
 
 if [ -z "$PACKAGE_NAME" ]; then
   panic "Please specify a package name on the command line. See --help."
 fi
 
 if [ -z "$NDK_DIR" ]; then
-  if [ -z "$ANDROID_NDK_ROOT" ]; then
-    panic "Can't find NDK directory, please source \
-build/android/envsetup.sh!"
-  fi
+  ANDROID_NDK_ROOT=$(PYTHONPATH=build/android python -c \
+'from pylib.constants import ANDROID_NDK_ROOT; print ANDROID_NDK_ROOT,')
 else
   if [ ! -d "$NDK_DIR" ]; then
     panic "Invalid directory: $NDK_DIR"
   fi
   if [ ! -f "$NDK_DIR/ndk-build" ]; then
     panic "Not a valid NDK directory: $NDK_DIR"
   fi
   ANDROID_NDK_ROOT=$NDK_DIR
 fi
 
@@ skipping 620 matching lines @@
 
 if [ "$VERBOSE" -gt 0 ]; then
   echo "### START $COMMANDS"
   cat $COMMANDS
   echo "### END $COMMANDS"
 fi
 
 log "Launching gdb client: $GDB $GDBARGS -x $COMMANDS"
 $GDB $GDBARGS -x $COMMANDS &&
 rm -f "$GDBSERVER_PIDFILE"